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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ab5e96d347f90dbaaeb3983b601e10ff9efa75e97939e2c65603f191acd6d719' 
  AND token = 'Pgjb9emOMdZWP+lu5U/xkhUBViO9TXrPwOwtT3yhVr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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