Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1df0c1a1747574ba252ca890f2def08a62d36e7071970e27305759718702d562' 
  AND token = 'sSImn8m4IB8kgJUD+quJDfMT8v1/T3gIhVj0+omgT2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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