Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2d2d181bb322c9a916b110066326069b702d9991fd66e7b13c980e1dc5ec3f8' 
  AND token = 'ZCIRRXv1aXAiQmFAinVSFs22zCg+KIOnyLH+ybDX6jI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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