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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dac450d939d6366e82cb10d380b1a2e28ac6dc1fe4bd812ceab42fe55c71d955' 
  AND token = 'Qr554jPq192J6D4lkN8/9+hE2P5OO6nHDLGTux2tg9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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