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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4fe3f407f684760e6ec54de46d6bc6fe6abafda2b4bc89bd034352316dd7d5b7' 
  AND token = 'bqmOM5plPvAvV7t2FzcQlXEnwvdEbbvp9lbSuW4pdao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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