Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ae9deb85b88395bf5d7a6add37804ecddc7cb0d4fb2ca8c6f54fb0a2f347fac' 
  AND token = 'q+wgPPNe79zfu519rOqO5EhPsaiJ2I2J5YlyD9Cs5ik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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