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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c36901c586e1bfeffb11e6c8e0a7747c2525934bcf65a67b745cfdecafca15c7' 
  AND token = 'R47I/hNe4Vrxp/H14DJcXOprQOvsX/7p7xxRcweA7+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}