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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7154b5533026aee6a6230c96d66cfd2958d9b9ceb8d6fbaa9ace50f5f4e3d8df' 
  AND token = 'RXk92HMwKo6danEopDeAtVAMK4iJ00l3gqicSl9r7HY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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