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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f0ece7bc787a6ba65cad00f8275ed6cfa6fa8011b3b259bdad8d0f7bd7f02dc4' 
  AND token = 'Ebw/NYcgnsx1ns+HxZnHG/H+dtAmo2IF3xCAdg4MB60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00087

JSON explain

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