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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f95c07ea33ac8a7a16f92e47fa6d9ab97d3fbf7ecbae6a705d23eb20a58ff97a' 
  AND token = '78F+BP7BAPRL8XtjBr0WOWftk4I8uYAqOw3Ra5fkjok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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