Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5344cfaff8108ce871f279456c7b21415d0145317fda1ae0f791c1e35ac3aca6' 
  AND token = '2uH4CyQuQk7nLKd1T+Iwo8exqGsJfyfYYYNldci1Rs4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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