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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1aeac2c809e23e78f6acc9672ec8ad8e6f7e1dbc552766d1bda33c2180366634' 
  AND token = 'dGxT23SZxZSQ6ge037v9uTeOrHzj3UnyID99ck4r5+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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