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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ed11c96143f4a986488b4dbf870fe947a6c482317e0bbdbc7db9135b3777bec9' 
  AND token = 'oH8/5jbT9IuVEhOEN0RljZ/+QYdIbsnhfxwuqb73TSE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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