SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d7b960926d6d9cf45697f71c201c5d1817c9c8cfa7dfb4c434830288f2aa005' 
  AND token = 'pjqDyHjZyjB+wtCBh498GGwiZiIObV6X7CEksnPS5tc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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