Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa0a26fc1a1a16d70182dd4a09cffdbd88daa3cf2b7297129108b328d50e6318' 
  AND token = 'kyKbEhCREJ27XepBDbfKD2Jord+z0A6Z5nR8b713YZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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