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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9a11252c644ad714edcfeba4c9ab6dc34be7452fb6c792923ffa3d7864805c7' 
  AND token = 'Q1t1G4X4TivcgBP9uY/zIwtcq0c4PKU/C0RbwFOHel8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}