Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7163d20ec728aec4c9015dc4f302469dc3cf2e67d3828dc79436454c0fbde10' 
  AND token = '0N70SLvgt0TXjaKH5ERm0kFfYehWPTkwKaL1MEpS85Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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