Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f599edc59fce948eb59c3a87574c0a44dc0ef51ebd62237ed017cf84e6c9b77' 
  AND token = 'Z+1fP5Rn315apG836OVaRrofrsr7VtSHPpivhnyJyRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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