Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a137015ae688762c00e56d197084b7eb06e880eea2e2b44be22ef855820bb0c' 
  AND token = 'uFyNcGQck5Jrd0MACOuom3d9PiN8tdZPTxleyspdNuY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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