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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '5d4d6fd5d343be89d0ce2d17e1714c28b1b70009f62ac90c1c84f0ba046106a2' 
  AND token = 'i/PAfXv4N3M3MbK9je/xTx8tXNUeObRcMcTXXk5AlVs=' 
  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"
    }
  }
}