Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a833df7f8c5f6fbcefe4e258cd92518b4e445bba29c37ef7d65c739b3ec26741' 
  AND token = 'nb+myyiz0eUusFWnNeIBLS78OYFOJabsRtSVkKeWIic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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