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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11d4cf89f7419a1b41a7f3704618616b7327e3eb7a2e2df432aa7b5c9373ca73' 
  AND token = 'Ywh5FHEJZEk6tuXK11QLuewdTlex7Gw59urwJohfpfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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