Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03a85d4eb2db6cbf04b7640dd9c18b040dd1ccde0dbfb0067bad3f172a533d68' 
  AND token = 'VCmvdNGf4345QBZK83WQhDleotMfZ1lldyr59BIidhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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