Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '820655765eef1367c9b0347811fb6ce1d590dad5966ad997084f90f3a8072963' 
  AND token = 'Aeb3YajzosIYvcZvlhv8ayoTwSWiEHEpcgx44Wb9o50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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