Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a9e1c36d4f7c445ee239fbf5a617dcddc3f1b3a536d8eb408eace566841672d' 
  AND token = 'tA65tbpO2iZp2URcRhKSydJ9ePYIJ1LDtpA9RnJDc9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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