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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f0c70642608c8ddf1a535712068932d8b10f9d8e20a9cdf199142974653e730' 
  AND token = '/gwX4lxULhSaWxILo8H8UJynKni/d532repHbRb/FNM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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