Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e87e7466f3de3e4e5c59a9015ca031c09371706c899a842a0e247b31123d44c7' 
  AND token = '4Ki9usy33drBHH3KK77Q2KkgieFTG/OEZfSsu8xXp3s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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