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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa22bfded285ada8422c0cf854df44b4a77ca344a74fcdea614db0e8579a65ff' 
  AND token = 'iIkX2sAk9XmegKKDXpmRAZUK7P3AsdxvbFSnayJHW+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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