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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5d33922a033fd65fad1ee3b72fb26174bdbe2bd5ab6132e983cbeb27093767f' 
  AND token = 'yRNzwHMKEOyU0rb9VxjCrxhjjsH03azjotz5pWlFyz0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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