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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1a358f3a613251d6f97adcf1170dc48a4b1eee9c782d827f1539153d70293f3b' 
  AND token = 'SORdeawdI4Ra96wTiU05DQxsmBaAAd57/IKis8UvmaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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