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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '37619c5c2e77acb70f8ea5ea370f23c9d9b79806786d35dea73cac1884634c41' 
  AND token = 'cgEGF8OGrPjwwl5FlHm6jMtMbgkPTXGdIdga2Q+CVj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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