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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ca41769c8f75359f8d0b8892a47a913d0ffca6b64003ba56db1e0037365f9fe8' 
  AND token = 'wpy9Q24YNs7trrjJQlAuKciHS+VfkN84H6bAvLWtmyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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