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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '227bbe0160fab459a4d724a3c18ee5ac7909597dbb733a0af7a30084304c5112' 
  AND token = 'Tu2j8UPf9U573y8CXnszcjlJ1wQSOo+Mq1lLK0VsSig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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