Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af2f864321224749c68de0956bc74fb2ceed9b66b9f0ac42e0b9825c05a72c31' 
  AND token = 'nGHmnf9YfpeBm4GMpZCL77DCRms22i7EgRNdeaOq5y8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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