Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e19e520749e913439eb9742d75f872898dd6955dc54766d5c065d0e3ade620d1' 
  AND token = 'GgVdr9NzMicEsRpQhFUHWSbcB66e5H9jNJWYJ7TRVME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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