Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0b0aa1bd657051a9117c0ea06195d4f31c6524f8add4a59f604a28de71b2604' 
  AND token = 'phoCbmPYGHJ16FA7R3a+CtxcIKXk0fU8B0TNZT7MAS4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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