Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'edc9ac59f6712ed8729911385682f27038755e902c59a37a02cc37e9652c1929' 
  AND token = 'Q8DS3KP683OksC3OXtq1aCPrXTdtyYtmQljRwANs3mg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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