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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2083c2b712ad3794d4220cd7c4a1472f93f814443ef7192c12800dade84e778e' 
  AND token = 'n3Tq+CiAn6VABY9jgE1bd9QYaejRnoSL6AERiVdE7xI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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