Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '650a362da754b8a28ec9db84a34661153e06d9af405f38326e503cb6de4d5ef2' 
  AND token = '+shEN+1drBLWeT1bPIe4S1acZ5i1cSwRn82xEDT5LVo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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