Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03be68588cdd65ab76dcda83a41c4034ddd75e2733bbc8f7bc3f28b658470641' 
  AND token = 'bW9XCTtvnI8141AcD768fsCQ+xP75B52Q3XP8oVHxfE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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