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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'f7431ac867529824378d73d94400d614ee83160b2e1c747ab4308fb514a6ead5' 
  AND token = 'OSdLrBeqOf7P1/Wr6pQXmyfSKZrhWuzW6E9I4xyF5/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"
    }
  }
}