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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04f344393e2af2a168f78ba5c8671d0bca2fb7aa797cae8906735aa976948270' 
  AND token = 'NOkSjFb/Jn5hv6ZcGe+d4q+/pD5dTN9Ah9/UDz8T3lE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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