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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9edd37a975e5110686bda5887e9f59e91378bca64664351abb2c16b4f08607f' 
  AND token = 'cZthJdwKPzL4XVteT+OgH24EeNF+sa7/s2T0qQ2eN8w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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