Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17e17fbeb18c79d3f8431e5f0e9f53c7bfd68c7b552289f82670fc1cbe5905ac' 
  AND token = 'KISS4P2RpZ3oav3397wTEAc/fZIvP/E/c8B+KAvAXdo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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