SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98025572e4513b6a754aa7ecdf7fa16089110babb43740d158ac6f683fbbd803' 
  AND token = 'ZwfkI06Uv98i2gzPWyQvWpqGMV/NURa1bKqcYJyvQ3k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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