Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '293d1023b90d523732dc64f2de7dca01880b1d17c71ec94543a41f0f4683d7fc' 
  AND token = 'O71JK7dsCGvYptxBPbeNtmH8kdLdA6HhlqMWKRARMJc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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