Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '640689d44066228f36a6e2578c291dc37e75a5bbe08cc3b32dc990775aeafe44' 
  AND token = '7s9YN2USCb41/AtmSBHbOc+hMm7zgdEy4QP3cMz3+CI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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