Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'addcb76a6bf3d995169d75941d9596260994719c6b99b7cfbfd83c675e7280d0' 
  AND token = 'nA5+dQNilTHBG/3eDk54yDh1PEI2pquxMZke2ZOX0xk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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