Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f250ca11ade0c49c1debcd5fcb9275d59609d8aa88c64614550bbe9fca86d0b0' 
  AND token = 'Eb88wvLXROFiQF0dfHoB0B3t8hHbXm4Vd4eO6q5Fm4M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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