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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aefceb8980cc5f288ba2851da9620a427cfa437cc169fd22f67444436c88ea6e' 
  AND token = 'kEixtdBbFz8M/moJrnXSf3Q7kKBQa4v9L97kDgsdzSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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