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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2aad60a73829565cca6811d9880dc4e061972476bd9382d8980f02a9f163b6a7' 
  AND token = 'F1yxie4eHafgt7/c+tGqNu8GogZFXkeMgdoL3/IaWUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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