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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ef114ac7cfad0c275bc77b5b56a924c17aec24eed1a23233183008ff2329b96' 
  AND token = 'jvQyeDZUY6gC5scQZszsgbr/u16VUKVZnS7OHIzuC6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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