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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '147f61a56778f85afdea1c788aaee46e43f180930517229565acb69306ea869f' 
  AND token = 'iPxdljO3QR8dF8wRm+75cYEYzpT/R80whJhlJAEiiys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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