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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b23d62b8e6e275e83453c7aef9758ee53704fe0fa3e226080e387217bb87098' 
  AND token = 'sfpYpdL5Kbc0dI/3z3vJaqIByEha8B84A13Mg+NVG/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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